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Component/YPbPr is split into RGB (red, green, blue) cables and suitable for upto 1080p HD. This would still require red and white (or red and black) audio cables.

Composite is the single yellow video connector (thus all three colours travel down the same cable), is unsuitable for HD, it is lossy and is noticebly lesser quality than component. The red and white you mention, only carry audio.

RGB Scart would outperform composite, so im guessing you do not want composite.